<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>Document</title>
  <style type="text/css">
    .container {}

    .container .cart {
      min-width: 450px;
      width: 600px;
      /*background-color: lightgreen;*/
      margin: auto;
    }

    .container .title {
      background-color: lightblue;
      height: 40px;
      line-height: 40px;
      text-align: center;
      /*color: #fff;*/
    }

    .container .total {
      background-color: #FFCE46;
      height: 50px;
      line-height: 50px;
      text-align: right;
    }

    .container .total button {
      margin: 0 10px;
      background-color: #DC4C40;
      height: 35px;
      width: 80px;
      border: 0;
    }

    .container .total span {
      color: red;
      font-weight: bold;
    }

    .container .item {
      height: 55px;
      line-height: 55px;
      position: relative;
      border-top: 1px solid #ADD8E6;
    }

    .container .item img {
      width: 45px;
      height: 45px;
      margin: 5px;
    }

    .container .item .name {
      position: absolute;
      width: 90px;
      top: 0;
      left: 55px;
      font-size: 16px;
    }

    .container .item .change {
      width: 100px;
      position: absolute;
      top: 0;
      right: 200px;
    }

    .container .item .change a {
      font-size: 20px;
      width: 30px;
      text-decoration: none;
      background-color: lightgray;
      vertical-align: middle;
    }

    .container .item .change .num {
      width: 40px;
      height: 25px;
    }

    .container .item .price {
      width: 100px;
      position: absolute;
      top: 0;
      right: 50px;
    }

    .container .item .del {
      position: absolute;
      top: 0;
      right: 0px;
      width: 40px;
      text-align: center;
      font-size: 40px;
      cursor: pointer;
      color: red;
    }

    .container .item .del:hover {
      background-color: orange;
    }
  </style>
</head>

<body>
  <div id="app">
    <div class="container">

      <my-cart></my-cart>
    </div>
  </div>
  <script type="text/javascript" src="js/vue.js"></script>
  <script type="text/javascript">
    var cartTitle = {
      template: `
        <div class="title">我的商品</div>
      `,
    }
    var cartList = {
      template: `
        <div>
          <div class="item" v-for="item in list">
            <img :src="item.img"/>
            <div class="name">{{item.name}}</div>
            <div class="change">
              <a href="" @click.prevent="subCart(item.id)">－</a>
              <input type="text" class="num" v-model.number.lazy="item.num"/>
              <a href="" @click.prevent="addCart(item.id)">＋</a>
            </div>
            <div class="price">单价：{{ item.price }}</div>
            <div class="del" @click="delCart(item.id)">×</div>
          </div>
        </div>
      `,
      methods: {
        subCart(id) {
          let index = this.list.findIndex((val, index, obj) => {
            if (val.id == id) {
              return true;
            }
          })
          this.list[index].num--;
        },
        addCart(id) {
          let index = this.list.findIndex((val, index, obj) => {
            if (val.id == id) {
              return true;
            }
          })
          this.list[index].num++;
        },
        delCart(id) {
          let index = this.list.findIndex((val, index, obj) => {
            if (val.id == id) {
              return true;
            }
          })
          this.list.splice(index, 1);
        }
      },
      props: ['list']
    }
    var cartTotal = {
      template: `
        <div class="total">
          <span>总价：{{ comTotal }}</span>
          <button>结算</button>
        </div>
      `,
      props: ['list'],
      computed: {
        comTotal() {
          // let total = this.list.reduce((acc, cur, ind) => {
          //   if (ind == 0) {
          //     return Number(acc.num * acc.price + cur.num * cur.price)
          //   }
          //   console.log(acc);
          //   return (acc + cur.num * cur.price)
          // })
          let total = 0
          this.list.forEach(item => {
            total += item.num * item.price
          });
          return total
        }
      },
    }

    Vue.component('my-cart', {
      data() {
        return {
          list: [{
            id: 1,
            name: 'TCL彩电',
            img: 'img/a.jpg',
            num: 0,
            price: 1000
          }, {
            id: 2,
            name: '机顶盒',
            img: 'img/b.jpg',
            num: 0,
            price: 1000
          }, {
            id: 3,
            name: '海尔冰箱',
            img: 'img/c.jpg',
            num: 0,
            price: 1000
          }, {
            id: 4,
            name: '小米手机',
            img: 'img/d.jpg',
            num: 0,
            price: 1000
          }, {
            id: 5,
            name: 'PPTV电视',
            img: 'img/e.jpg',
            num: 0,
            price: 1000
          }],
        }
      },
      template: `
        <div class="cart">
          <cart-title></cart-title>
          <cart-list :list="list"></cart-list>
          <cart-total :list="list"></cart-total>
        </div>
      `,
      components: {
        'cart-title': cartTitle,
        'cart-list': cartList,
        'cart-total': cartTotal
      }
    })
    var vm = new Vue({
      el: '#app',
      data: {

      }
    });
  </script>
</body>

</html>